Automatic safety attachment for tractors



T. A. MILUTIN.

AUTOMATIC SAFETY ATTACHMENT FOR TRACTOBS.

APPLICATION man JUNE 1, 1920.

T. A. MILUTIN.

AUTOMATIC SAFETY ATTACHMENT FOR TRACTORS.

APPLICATION FILED JUNE 1, 1920.

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(1Mo: mail T. A. MILUTIN.

AUTOMATIC SAFETY ATTACHMENT FOR TIT-ACTORS.

APPLICATION FILED JUNE I. 1920.

1,368,280. Patented Feb.15,1921.

4 SHEETS-SHEET 3.

T. A. MILUTIN.

AUTOMATIC SAFETY ATTACHMENT FOR TRACTORS. APPLICATION FILED IuIIE I, 1920.

1,368,280. Patented 1610.151921.

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UNITED STATES] 'rniioinn ,-iriilu'rrivkgr niiaaiaoitm MIcHIeAN. Y'

. j t AUTOMATIG SAFETY ATTACHMENT FOR TRACTOBS.

To all wlwm t may concern.' j

Beit known that I,THEoDoRE A. M ILUTI, citizen of Russia, residing at Dearborn, county of Wayne, State of Michi an, have invented a certain new and useful mprovement in Automatic Safetyv Attachments for Tractors,`and declare the4 following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference bein had to the accompany-y ingdrawings, whic form a part of this specification.

My invention relates to an automatic safety attachment for tractors, its object being to prevent a tractor from overturning as a result of a sudden stoppage dueto meeting ment,

an obstruction while the engine is operating to drive the tractor.

Many casualties occur in operating tractors through the sudden stoppage of the 'machine while the power of the pri-me mover is being applied to drive the tractor,-there being a tendency for it to tilt upwardly upon its rear axle until attaining a certain degree' of angularity,it suddenly overturns,crush inthe operator beneathl its weight.

l he present invention lis designed as a modification of two former inventions described in the applications filed byv me on the 6th and 16th days'of April, 1920, and respectively bearing Serial Numbers 371,658 and 37 4,308. One of the objects of the present invention is to provide va more simple and inexpensive construction with a more positive action of the clutchreleasing means. The invention consists also in an improvement in the general construction, arrangeand j combination of -parts hereafter more fully described and claimed, itbeing understood that changes may be made in the precise embodiment herein disclosed without departing from the spirit of the same.

In the accompanying drawings forming 'part of this specication and c utch assembly,with its inclosing case' in 'section,-showing on a larger scale the means for automatically releasing the clutch mechanism.

Fig. 3 is a cross-sectional view taken on Aor'about line 3-3 of Fig. 2, showing a --ratchet gear on the 'power takeoff shaft,

Patented Feb. 15,

ing parts serves to automatically release the drlving clutch upon the tractor tilting to a predetermined degree'.`

\.Fig. 4 is a fragmentary elevation of the parts as indicated in Fig. 2, showing the ratchet gear operating. to release the driving` c lutch as it would appear when the tractor is tilted to a certain predetermined degree of an ularity. y ig. 5` is a sectional View of a detail, showing the movable weight, inclosed in its supporting case, as it would appear in its normal position. 4

Fig. 6 is a fragmentary sectional view, showing the relatively adjustable connection between the ratchet bar and its supporting arm.

Referring now to the letters of reference placed upon the drawings y A, denotes a tractor; B its power takeoff shaft actuated by the bevel gear C in mesh with a like gear D on the driveshaft E.. i

B is the usual driving pulley on the power take-off shaft.

F, indicates' the driving clutch and F the clutch lever. j

Gr, is a rocking arm on the shaft G for operating the clutch lever F', and Gr2 is a clutch pedal for actuating the clutch arm. H, indicates'the usual transmission gearing.

I, denotes a ratchet 'gear keyed to the power take-off .shaft B. J, denotes an arcshaped ratchet bar, sleeved upon the end of an arm K, projectin from'the4 shaft vGr. J', isa bolt bridging t e socket in the upper end of the ratchet bar, and. extending through a slotted opening in the end K of the arm K. J 2 is a spring attached at one end to the .bolt J and at-its opposite end to abolt secured to the arm K, the spring serving to lift and normally maintain the ratchet bar J `in released relation to the ratchet gear I. L, indicates a movable weightedelem'ent housed in a chamber L" bolted to the clutch and transmission housing M. The chamber L is slotted on its underside to admit the free end of a movable'arm N, secured to the end of a spring N which is in turn bolted to the wall of the casing. The spring N yieldingly maintains the arm N normally projected c through the slotted opening into the chamber L to receive the whichacting in'conjunction withcoperatbar latter is automatically shifted from its normal position in the pocket L3 to the pocket by the tilting of the tractor. The pockets L and L4 are separated in the chamber by a ridge L, over which the element L travels in passing from one pocket to the other. In order that the arc-shaped ratchet bar J ma be yieldingly maintained upon the arm Ny to the ratchet gear L, a spring P 1s provided connected at one end with the arm K and at the other end with the housing M or other suitable support.

The arc-shaped ratchet bar J, is also fitted vvith a pin j, (see Fig. 3) designed to reccive the downward thrust of the spring supporte'd arm N, when the latter is depressed through the shifting of the weighted element L from the pocket L3, (its normal position) to the pocket L4,-u on an abnormal tilting of the tractor. he ratchet J thereupon automatically engages the ratthet gear I, which due to itsl rotation, forces the arm K to bear upon a pin G3, projactii T laterally from a downward extension (1*, of the rocker arm G. The shaft G is thus rocked, thereby causing the armG to bear against the end of the clutch lever to release the clutch which thus overcomes any tendency of the tractor to overturn The tilted end of the tractor will now descend to the ground, upon the operator moving the usual gear shift lever to neutral, whereupon the tractor wheels may be released from the obstruction which served to revent their rotation.

aving thus described my invention, what I claim is 1. In a tractor, the combination of a' power take-oil'l shaft, av driving clutch, means for releasing the driving clutch, means carried by the power take-oil shaft for operating said releasing means, and means actuated through an abnormal tilting in a proper coperative relation' shaft, a rocking arm adapted to operate the clutch lever, a ratchet bar adapted to telescope upon the rocking arm, a chamber, a movable element lod ed within said chamber, adapted to shi its position therein upon an abnormal tilting of the tractor, and a resilient arm normally projecting into said chamber and adaptedto be forced by the movable element to bear upon the ratchet bar, whereby the latter may be brought into meshed relation with the ratchet gear to release the driving clutch.

3. In a tractor, a driving clutch, a clutch releasing lever, -a power take-off shaft, a

ratchet gear mounted on the power take-oill shaft, a rocking arm, adaptedto operate the clutch lever, a ratchet bar, adapted to telescope upon the end of the rocking arm, a spring connecting the `ratchet bar with 'the rocking bar, a spring adapted to maintain said ratchet with the ratchet gear, a chamber housing a movable element adapted to shift its'posi- THE'ODQRE A. MILUTIN.

Witnesses:

S. E. THOMAS, JOHN CoNsInINn, Jr.

bar in positlon to coperate 75, tion therein upon anabnormal tilting of the normally projecting. -mto said vchamber adapted to e 

